My Identity As A Schoolmaster Has Been Exposed

Chapter 119

The topic is eye-catching.

Huo!

A lot of words.

my country has a long history of Jinshi culture. Seals are one of the representatives of Jinshi culture. The shapes of seals are mostly cuboid, cube or cylinder, but the shape of the seals of Guanyun Dugu Letters from north to south is a semi-polyhedron” (Figure 1).

A semi-regular polyhedron is a polyhedron surrounded by two or more regular polygons. The semi-regular polyhedron embodies the beauty of mathematical symmetry.

Figure 2 is a semi-regular polyhedron with 48 edges. All its vertices are on the surface of the same cube, and the edge length of this cube is 1.

How many faces does the semi-regular polyhedron have, and what is the edge length? Xu Cong took a look at the picture.

Lin Mengjiao was watching with her big eyes blinking while chattering on her mouth: “So many words! There are also such graphics, and what is the solitary letter? This college entrance examination math is used to test us, and even history is taken out.”

“Look at this picture, it should be a cultural relic, right?”

Xu Cong heard her mutter, and Lin Mengjiao gave Lin Mengjiao a white look, and immediately asked, “Does Du Guxin know?”

Lin Mengjiao shook her head, how would she know this…

Xu Cong began to tell him: “This is a great man in history, and he is also the best old man in history!”

Lin Mengjiao asked in surprise, “How awesome can it be?”

Xu Cong, “The four daughters of my family are all queens. He was an important general in the Northern Zhou Dynasty. This seal of his is said to have been found by a group of students on the way home from school. At first I thought it was a strange stone. Thinking of it is priceless.”

“It’s still on display in the museum now.” Lin Mengjiao’s eyes lit up and she became interested. ”

Knowledge points have increased again!”

“By the way, Xu Cong, when you do the questions, do you always think like this?

Xu Cong rolled his eyes, “I’m just thinking about it? I’m doing this for you! In order to spread your knowledge.”

Lin Mengjiao suddenly became dumb, always so humble in front of Xueba.

Xu Cong, “Okay, let’s take a look at the question. The front is all nonsense. From the back here, it is the main topic, which is related to mathematics. It is about the three-dimensional understanding of a polyhedron.”

“If you understand Euler’s formula, this question will be very simple!”

Lin Mengjiao lay beside Xu Cong, listening carefully.

Xu Cong is lying down, “According to Euler’s formula v+f-e=2!”

Lin Mengjiao, “Wait, what what?”

Xu Cong, “v means the vertex, f means its face, and e means the number of edges.”

“I ask you, the number of edges is 48, so what is the vertex?”

Lin Mengjiao, “Huh? How much? Let me take a look. Let me take a look at 1, 2, 3, 4…”

Xu Cong, “What are you doing?”

Lin Mengjiao curled her lips, “I count-count!”

Xu Cong, “Don’t count, it’s 24. Then you know the number of fixed-point edges. Then this face will come out? The numbers go in one generation, and there are 26 faces.”

“do you understand?”

Lin Mengjiao was silly, “You talk about yours first, I will digest it by myself then, what’s next!”

Xu Cong, “This asks what is the length of the edge? See Figure 2 for the main view.

Xu Cong started to draw, Lin Mengjiao’s thoughts could barely keep up, and he hummed, “Hmm! You continue.”

Xu Cong, “Simply arithmetic, so the final answer is the root number 2-1! You digest and digest first, ha, I’ll go to sleep again.”

Lin Mengjiao looked at this question and blinked her big eyes. She looked at the title and then at Xu Cong.

“Boom~~~!” I couldn’t help but gave him a sip, and then praised: “You are awesome!”

Xu Cong smiled, without opening her eyes, Lin Mengjiao continued to read the question, she was so tired of Xu Cong’s side, she looked like a cat.

When Xu Cong opened his eyes again, Lin Mengjiao looked at herself idiotically, “Don’t tell me, take a closer look, you’re pretty handsome!”

Isn’t this nonsense!

“But I’ve never seen it so close! The more you look, the more handsome.”

Okay! Xu Cong smiled, please continue your rainbow fart, when they got up, it was almost four o’clock in the afternoon, He Junfei came to the door.

“Xu Cong…”

He is holding an exam paper, a college exam paper.

Since knowing Xu Cong’s results, He Junfei has been anxious. He desperately wants to make progress.

At the same time, he also wanted to confirm Xu Cong’s true strength. He has not tested Xu Cong’s bottom line for a long time.

He knew that Xu Cong must be better than himself!

However, it is not known how powerful he is. As soon as he came, he asked: “Xu Cong! Are you free? I want to ask you some questions. College entrance examination questions, okay?”

Lin Mengjiao was surprised, “Are you also doing college entrance examination questions recently?”

Are you doing it recently?

and also?

He Junfei heard what she said, and then asked: “Uh…what do you mean, so does Xu Cong?”

Lin Mengjiao smiled and hurriedly waved her hand and said, “No, no, Xu Cong can’t do it. It’s me. I just look at the college entrance examination questions I have learned so far, find some, no, let Xu Cong tell me.”

He Junfei thought, what happened to the students in Xiling High School?

Lin Mengjiao, you are only a sophomore in high school, so you just look at the math questions in the college entrance examination?!

Am I behind again?

???

“Even the ordinary classmates of your school’s second year of high school have begun to work on the college entrance examination questions?”

He Junfei was so stupid, he thought he was excellent!

But he never expected that ordinary classmates had started, and he felt that he had suffered a great insult.

—Time, He Junfei stared at Xu Cong, feeling that the gap between each other was even greater! It is no longer a high-level examination paper that can be measured!

Xu Cong said impatiently: “Do you have a question to ask me? Come on, hurry up and ask, hurry up, and wait for dinner.”

One of the purposes of He Junfei’s asking questions was disintegrated, but his other purpose was to know the answer! He handed the test paper to Xu Cong, “This question.”

Xu Cong scanned it again.

topic:

The ancient Chinese “Zhou Yi” used “hexagrams” to describe the changes of all things.

Each “heavy hexagram is composed of 6 lines arranged from bottom to top, and the lines are divided into yang lines”—”and yin lines”—” What is the probability that the heavy hexagram has exactly 3 positive lines?

He Junfei, “I don’t know much about Zhouyi…”

Lin Mengjiao covered her mouth and smiled, Xu Cong raised her eyebrows, “This is a math problem, not the literary “Book of Changes”.”

“Um” He Junfei was ashamed.

Xu Cong added: “This question has nothing to do with Zhouyi. It only requires you to convert words into mathematical language.”

“Six things are divided into 2 groups, so first calculate how many there are in total. What is it?”

He Junfei can do this, “One is two kinds, if six, it is 2 to the 6th power, which is the total number.”

“I understand, I understand!”

Once he realized that He Junfei understood the question, he smiled at Xu Cong.

Xu Cong said, “You are only a sophomore, this test paper is not very suitable for you.”

He Junfei, “Why do you say that?”

“I think I was exposed to fewer questions in the college entrance examination, so I was stumped by the superficial words on this question.”

“Furthermore, at present my teacher teaches, I can do it, and I have learned the super outline, so it is not good to think about these topics myself?”

“Even Lin Mengjiao said, aren’t you the same?”

Xu Cong, “But Lin Mengjiao knows how many catties she is, and the topics she has done are what we have learned before, or are learning, and you are not the same!”

He Junfei pursed his mouth and pushed his myopic glasses awkwardly, “So?”

Xu Cong directly attacked him: “Look at the fill-in-the-blank questions in front of you. There are mistakes and multiple-choice questions, so don’t make a swollen face to fill a fat man!”

He Junfei had a numb scalp. He just got the test paper, how did he know that I was wrong, and immediately asked: “You, how do you know what I did wrong? You obviously just got the test paper. Have you done this test paper before?”

Xu Cong shook his head and said to him: “When I just looked at your question, I scanned it a few times and found it.”

Fuck!!!